Product Tested

front label

Click above for larger image

back label

Click above for larger image

Black Knight Products

Company and Product Information

Corporate Office:
Jasper, TX 75951

Website(s):No Websites Found



The Petroleum Quality Institute of America (PQIA) is an independent resource for information and insights on the quality of lubricants in the marketplace. Our mission is to serve the consumer of lubricants by randomly sampling and independently testing lubricants taken from the field. Test results are posted along with the brand names on the PQIA website. This webpage provides an analysis on the brand detailed below.

The following are the test results for the sample examined.

SB/CB Classification

SB/CB Classification

Manufactured by: Black Knight Products

Purchased at: Gaithersburg, MD

Date of purchase: 1/25/2015 



Test Results and Assessment:

Although the label on the bottle says “Recommended for Pre-1988 Gasoline and Diesel Engine Requiring SB/CB Motor oil," it should be noted that the API Service Category listed on the product label (API SB/CB) is OBSOLETE and is not suitable for use in most gasoline-powered automotive engines built after 1951. Use in more modern engines may cause unsatisfactory performance or equipment harm. In addition, the labels do not properly state the viscosity grade, which should read "SAE 20W-50".

Note: Black Knight 20-50 was ordered off the shelves by the State in Alabama and Georgia. Other grades of Black Knight were ordered off the shelves by the State in New Jersey and Missouri.

bottle icon Physical Properties pass
Elemental Analysis pass
Labeling warning

Note: Although laboratory tests alone cannot be used to establish if engine oil meets an API Service Category, they can be used to determine if it doesn't.

PHYSICAL TESTS (click for test details) - a Standard Black Knight
TBN, mg KOH/g (ASTM D2896) 2.47
Viscosity @ 100ºC, cSt (ASTM D445) 16.3 to <21.9 16.6
Viscosity @40ºC, cSt (ASTM D445) 131
Viscosity Index (ASTM D2270) 137
Viscosity @-15ºC mPa s (cP) (ASTM D5293) 9,500 Max 4,224
ELEMENTAL ANALYSIS (click for test details) - a, b
Calcium 687
Magnesium 36
Phosphorus, ppm 260
Zinc, ppm 298
Molybdenum,  ppm 19
Barium, ppm 0
Boron, ppm 29
Silicon, ppm 17
Potassium, ppm 4
Manganese, ppm 0
Titanium, ppm 1
Copper, ppm 0
Sodium, ppm 11
Vanadium, ppm 0
Silver, ppm 0
Aluminum, ppm 1
Chromium, ppm 0
Iron, ppm 0
Nickel, ppm 0
Lead, ppm 0
Antimony, ppm 1
Tin, ppm 0
  1. Standards, shown in yellow are established by API, SAE and others.
  2. Test Method for metal analysis is ASTM D5185.
  3. This specification is expressed to two significant figures, therefore results up to 15.5 are considered on specification.